I could certainly be mistaken, but I'd bet my net worth that this is about making a product that will resonate with global black youth. From Canada to eswatini. From Addis to Trinidad and Tobago.
And that market is enormous.
It is weird how we just tend to generalize over all of this because of the color of one's skin.
Wouldn't BET+ be BET for the internet?
Black people are certainly entitled to watch whatever content they choose, but they are not unique in their "different lived experiences". "White people" are not some amorphous, homogeneous group.
That's entirely your own interpretation and you might want to consider why you think this way.
There is nothing stopping a white person from subscribing to "Netflix for black people" if they think the content may be of interest to them.
You are in America:
Vending machine for Americans sells Gatorade
You are in Mexico
Vending machine for Mexicans sells Agua Fresca
Vending machine for Americans sells Gatorade
This is no different then X for X people.
They aren't saying you aren't welcome, it's more so that you likely don't know if you'll even like Agua Fresca. Mexicans know they love Agua Fresca.
Maybe Mexicans don't really like Gatorade, but they know that the Americans in Mexico would like to have some Gatorade - boom it's a niche, it's a business, profit can be made.
This is NOT discrimination, it's catering to a market. Discrimination is treating unjustly. It has nothing to do with providing X for X. Y could totally have X, no one cares, it's just that Y just may not enjoy it, relate to it or even want it.